<?php
include_once('conn.php');
$stu_id=$_GET['stu_id'];//
$sql = "delete from `student_info` where stu_id=$stu_id";
$ret = mysqli_query($conn,$sql);
if($ret){
    echo "删除成功！<a href='./index.php'>返回首页</a>";
}else{
    echo "修改失败！";
}